X Factor Stars: Then & Now

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A sweet and innocent Britney Spears was seen at the 1999 Teen Choice Awards. A much more mature Spears made an appearance at the ‘We Will Always Love You: A Grammy Salute to Whitney’ event in October 2012

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Demi Lovato is seen at the New York ‘Camp Rock’ premiere in 2008. Four years later, the Disney star turned ‘X Factor’ judge attends the iHeart Radio Music Festival in Las Vegas

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In 2000 — and in 2012 — ‘X Factor’ judge LA Reid looks like a million bucks in his tailored suits